VIM

Create heading 1 in markdown
```
:map h1 yypVr=o
```
Create heading 2 in markdown
```
:map h2 yypVr-o
```
Replace content from current file to end of file
```
:.,$s/pattern1/pattern2/gc
```
Change certain number of lines from current line
```
:.,.+<number>s/pattern1/pattern2/gc
```
Usage : :.,.+4s/foo/bar/gc # this is will replace foo to bar

from current line to next 4 lines.